It looks like the site is indeed loading through HTTPS, but some resources are still called through the simple HTTP.
The actual error looks like this:
Mixed Content: The page at 'https://sipoftea.net/' was loaded over HTTPS but requested an insecure font 'http://sipoftea.net/wp-content/themes/patch/assets/fonts/fontawesome-webfont.woff2?v=4.3.0'. This request has been blocked; the content must be served over HTTPS.
Can you check if you have any caching plugins (eg. Hummingbird) and try to reset/clear the cache?